大多数使用者对于安全攻击的知识都很匮乏。
Most users' knowledge of security vulnerabilities of their systems is vague at best.
到目前为止，其他的科学家一般都愿意分享他们的知识，但公司希望能够向数据库的使用者收取很高的费用，Downs为此感到不安。
So far, other scientists have generally been willing to share their knowledge, but Downs is troubled by the prospect of companies' putting exorbitant user fees on their databases.
GNU通用公共许可证(GPL)和其他著佐权(copyleft)使用知识产权法来保护每个使用者的自由。
The GNU General Public license and other copyleft licenses use copyright law to defend freedom for every user.
应用推荐